To celebrate the 25th Anniversary of Back To The Future, we've got never-before-seen footage of original star Eric Stoltz as Marty McFly. Plus Robert Zemeckis, Steven Spielberg and Bob Gale all explaining why they replaced him with Michael J. Fox.

Don't get us wrong, we're Fox fans through-and-through, but it's exceptionally shocking how perfect Eric Stoltz looks in these scenes! But producers and directors are right, this would have been a much more somber franchise with Stoltz at the wheel of the DeLorean.

This clip is just a snippet from the Back To The Future 25th Anniversary trilogy DVD and Blu-Ray box set, which comes out on October 26, 2010.